High Strength Anhydrite Cement Based on Lime Mud From Water Treatment Process: One Step Synthesis in Water Environment, Characterization and Technological Parameters
Year: 2024
Type: article
Abstract: ABSTRACT In the process of water treatment from surface water sources, lime mud as waste is formed. This waste contains CaO, Ca(OH) 2 , and CaCO 3 . The article proposes a comprehensive method for processing lime mud into high‐strength anhydrite cement. The method involves the interaction of lime mud with waste sulfuric acid from the production of polymer fibers using a structure‐controlled method in the (CaO·Ca(OH) 2 ·CaCO 3 )—H 2 SO 4 —H 2 O system at a temperature of 40°C. X‐ray diffraction analysis showed the presence of CaSO 4 and CaSO 4 ·0.62H 2 O phases with a purity of 99.8%. The structure‐controlled method makes it possible to control the formation and growth of calcium sulfate crystals of the required shape and size, due to which it is possible to obtain anhydrite cement with desired properties. Combined grinding of synthetic anhydrite with activator additives makes it possible to obtain anhydrite cement with a strength of up to 28.5 MPa.
Source: Engineering Reports
DOI: 10.1002/eng2.13054
Institutions: Belarusian State Technological University, Southwest University of Science and Technology, National University of Science and Technology, National Academy of Sciences of Belarus, Institute of General and Inorganic Chemistry of National Academy of Sciences of Belarus, State Key Laboratory of Solid Waste Resource Utilization and Energy-Saving Building Materials, St Petersburg University, Moscow Polytechnic University, University of Virginia
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,970
OpenAlex ID: W4404510011